Can body or tube forming machine



P.K.RUSE. CAN BODY 08 TUBE FORMINGMACHINE.

APPLICATION FILED MAR 18, 1921.

Patented 0015.31, 1922.,

4 SHEETS$HEET lg a? a N/H v P. KRUSE.

CAN BODY 0R TUBE FORMING MACHINE.

APPLICATION FILED MAR. 18, I92I.

1 488 629, 7 Patented 00t.31,1922.

4 SHEETS-SHEET 2L P. KRUSE.

CAN BODY 0R TUBE FORMING MACHINE.

Patented. (Pet. 31, 1922 N MS & H

P. KRUSE.

Patented. Oct. 31, 1922..

4 SH EETS-SHEET 4- Patented Diet. 311, 1922.

UNHTEM A than PETER KR'USE, 03F BROOKLYN, NEW YORK, ASSIGNOR TO E. W.BLISS COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF WEST VIRGINIA.

CAN BODY OR TUBE FORMING: MACHINE.

Application filed. March 118, 1921. Serial No. 453,342.

The present invention provides amachine in which can bodies or tubeswith a reinforced seam (that is, a seam formed by U ing or channelingthe lapped edges of a sheet of metal and flattening the channel so thatthe sides of the channel inwardly collapse) may be rapidly andexpeditiously formed.

The invention further provides a novel combination, andsub-combinations, for carrying out the purposes of the invention.

An embodiment of the invention is illustrated in the accompanyingdrawings, wherein Figure 1 is a view, in end elevation, of

said embodiment;

Fig. 2 is a view in side elevat1on, 1n partial section (the sectionbeing on the line 2, Fig. 1), of the construction shown in Fig. 2 is apartial sectional view on the line aa, Fig. 1;

Fig. 3 is an enlarged detail view of certain of the principal operatingparts shown in Fig. 1, the view being principally a sectional view;

Fig. 4: is a view similar to Fig. 3, showing the parts in a differentposition;

Flg. 5 is a view showing in somewhat greater detail certain of the partsshown in Figs. 3 and 4, and showing said parts in the final seam-formingposition;

Fig. 6 is a detail view, principally in section, on the line 66, Fig. 1;

Fig. 7 is a detail view, in side elevation, of the horn;

Fig. 8 is a detail sectional view on the line 8-8-. Fig. 6;

Fig. 9 is a detail view, in front elevation, of the edge bender shown inFigs. 1 and 2.

Referring to said drawings, numeral 10 designates a horn of any suitableform and contour, according to the shape of the tubes or bodies to beformed.

A piece of sheet metal or the like, X, is placed or wrapped around thehorn 10 in such manner that its edges overlap,, as shown in Fig. 3. Thesheet of metal X is preferably automatically fed and wrapped around thehorn, and for this purpose the machine may be provided with areciprocatory feed bar 12, and folders 14, preferably of the wing type.The feed bar or bars 12 are conveniently connected to a cross bar 15which is reciprocated by means of an oscil lating lever 16 connected bymeansof a link 17 to a crank pin 18 on a disk 19 on one of themain'shafts 20 of the machine.

The wing folders may be conveniently operated by-means of a lever 24:,through connecting rods 23, the lever 24: being conveniently connected,by means of a rod 25, to a crank pin 26 on a disk 28 on another of themain shafts 30 of the machine.

Numeral designates an outside former,

and 36 an inside former, which parts coact to U or form into-a channelthe lapped edges of the sheet of metal. The inside former isconveniently mounted upon the horn, and the outside former isconveniently on a part 38 mounted upon a slide 39, movable toward andfrom the horn, movement to the slide 39 being conveniently impartedthereto by means of a rod or rods 41 engaging, by

means of rollers 42, cams 43 conveniently on the main shaft 20. The endsof the rod or 'rods 41 are conveniently forked, as indicated at 44 (Fig.2), and straddle the shaft 20 (or a collar thereon), and thereby guidethe said rod or rods 41. For compe hug the rod orv rods 41 to closelyfollow the cam,

a spring or springs 45 may be attachedto the said rod or rods 41. Thepart 38 may be adjustably mounted in the slide, by means ofscrew-threads 48 (Figs. 1 and 3).- Look nuts 49 may serve to hold thepart 38 in a position on the slide.

Means are provided for compressing the U-ed or channeled portion formedin the lapped edges of the sheet. These means are conveniently a hammer50, in the form of a.

plate corresponding in the length to the seam, and conveniently workingthrough the outside former 35. The hammer or plate 50 is convenientlyattached to a block 52, and

this block 52 conveniently abuts aspring pressed block 5 1, the'springs55 tending nor- 1 carryin the hammer 50. Movement is convenient yimparted to the plunger 57 by means of an eccentric strap 59 surroundingmounted and guided in the horn 10. The

the horn, of the wing an eccentric 60 on the main shaft 20.

Theinside former 36 is adapted to recede during the hammer stroke of thehammer 50, and to this end the inside former is conveniently formed withcams or inclined planes 63 coacting with a cam or inclined planes 61 onaslide 62, the slide 62 being conveniently slide 62 is conveniently movedback and forth by means of a lever 65 connected thereto by a short link66, the lever 65 being actuated by an arm 67 having a in or roller 68engaging a cam groove 69 in a disk. 70 conveniently mounte upon the mainshaft 20. The arm 67 is conveniently forked, as indicated at 72, andstraddles the shaft 20 or a collar thereon, in such manner as to beguided on said shaft.

The wing folders conveniently comprise a pair of pivoted arms 80havingflexible tips or portions 81 thereon for engaging and wrapping thesheet of metal around the horn. These tips 81 are conveniently pivotedto the arms 80, as indicated at82, and resiliently pressed around saidpivots by means of springs 84 (Fig. 3), the movement of the said tips 81around their axes 82 being limited by means of headed screws 86.

For holding the wrapped sheet of metal during a part of the movementaway from folders 14, means, such as resilient blocks 90, may beprovided. These blocks 90 are conveniently carried in the arms 80, andare resiliently pressed toward the horn by means of springs 92, ,the

inward movement being conveniently limited by means of nuts 93 on screws94.

The horn is conveniently provided with collapsible or resilient portions100. These portions collapse or yield to reduce the perimeter of thehorn, in order to facilitate the discharge or sliding off of the formedbodies or tubes. These portions 100 are conveniently in the form ofdovetail strips fitting corresponding grooves in the horn, and pressedoutwardly by means of springs 101.

For facilitating the wrapping of the sheet around the horn, the machine,at a osition in advance of the horn and Wrappm station, may be providedwith means, suc as a roller 110, and an anvil 111, adapted to bendslightly the edge of the sheet wh1ch is" folded in againstthe horn aheadof the other edge. This position of the lapped edge portions is clearlyshown in Fig. 3.

For facilitating the entrance of a sheet of metal between the horn 10and a ledge 115, the horn may be mounted upon a slide 116, the slide 116being adapted to be moved very sli htly from the ledge 115 as the sheetis fed onto the horn, this movement of the slide being convenientlyeffected by means of a bell crank lever 120 connected to the slide bylink 121, and receiving motion from a cam 122 conveniently on the mainshaft 20. This cam and the bell crank lever is shown in detail in Fig. 2of the drawings.

Operation: A sheet of metal is wrapped around the horn 10, with its edgeportions overlapping, asshown in Fig. 3. The wra ping is convenientlyautomatically done y means of wing folders 14, which, when the sheet isfed to the horn position, as they swing together, carry the sheet (X,Fig. 1)

with them and wrap the sheet around the horn. Previously to reaching thehorn p0 sitlon, one edge portion of the sheet is conveniently bent, asby means of the roller I and anvil 110, 111. This bent edge enables theedges to lap without interference.

The inside former 36 is held in projecting position, as shown in Fig. 3.The slide 39 carrying the outside former 35 approaches during thewrapping movement, and as the wing folders start to move away, theoverlapped edges are conveniently held by the resilient hammer 50 whichbears against the overlapped edges of the wrapped sheet X. Moreover, theoverlapped edges of the sheet,

during this initial movement away, of the wing folders, are held frommoving apart by means of the resilient blocks 90, which continue topress the sheet against the horn during the initial movement away of thesaid wing folders. During this initial movement away, of the wingfolders, the inside former starts its bendlng action upon the lappededges of the sheet, and forms a channel or U-ed portion of the length ofthe tubular body former by the wrapped sheet. During this bending orU-in action, the resilient hammer 50 yields, an when the outside former35 reaches the limit of its movement toward the horn, the lapped edgesof the sheet have the form shown in Fig. 4. The slide 62 at about thistime is given a quick movement, lifting the inside former out of thechannel or U-ed portion fof the lapped edges of the'sheet, and, theinside former being withdrawn, the parallel walls of the U or channelcolla se inward, and a seam, such as shown in ig. 5, is formed. The.outside former 35 thereupon moves naaaeae a hammer 50, and the can'bodymay then be removed or ejected from-the horn. To facilitate the removal,the collapsible or resilient horn sections 100 yield, reducing the,

perimeter of the h orn and allowing the tube or can body formed fromthewrapped sheet while held by said'outside' former, said in- X to beeasily removed from the horn.

The invention may receive other embodiments than that. hereinspecifically illustrated and described, and parts and sub-com binationsmay be used out of the specific combinations referred to.

What ll claim is e 1. An apparatus of the character described,comprising a. horn around which a piece of sheet metal is adapted to bewrapped with ends overlapping an inside former and an outside formeradapted to bend the overlapped portions of thepiece of sheet metal intoU or channel form, means for compressing said U-ed overlapped porbendthe overlapped portions of the plece of tions while held by said outsideformer, and means for moving said inside former out of the ll-ed portionto permit the inward collapse of the U-ed porti ns, andthereafterholding said inside former to act as an anvil while said compressingmeans presses said collapsed portions on sald anvll to com-' plete theformation of the locked seam.

2. An apparatus of the character described, comprising a horn aroundwhich a piece of sheet metal is adapted to be wrapped with endsoverlapping, an inside former and an outside former adapted to bend theoverlapped portions of the piece of sheet metal into U or channel form,means for compressing said U-ed overlapped portions while held by saidoutside former, and

means for moving said inside former out of the U=ed portion to permitthe inward collapse of the U-ed portions, and thereafter holding saidinside former to act as an anvil while said compressing means pressessaid collapsed portions on said anvil to complete the formationof thelocked seam, said horn having a resilient part adapted to yield toreduce the erimeter of said horn to ease the ejection of said formedbody or tube.

3. An apparatus of the character described, comprising a horn aroundwhich. a piece of sheet metal is adapted to be wrapped'with endsoverlapping, an inside former and an outside former adapted to bend theoverlapped portions of the piece of sheet metalv into positionto holdthe lapped ends ofsaid into U or channel form, and means for compressingsaid U-ed overlapped portions while held by said outside former, saidinside former being movable out of the U-ed portion to permit the inwardcollapse of the lled portions, and the consequent formation of a lockedseam, and wing folders adapted to wrap said piece of sheetv metal aroundsaid horn.

a. An apparatus of the character described, comprising a horn aroundwhich a piece of sheet metal is adapted to be wrapped with endsoverlapping, an inside former and an outside former adapted to bend theoverlapped portions of the piece of sheet metal into U or channel form,and means for compressing said [Ll-ed overlapped portions side formerbeing movable out of the U-ed portion to permit the inward collapse ofthe U ed portions, and the consequent formation of a locked seam, wingfolders adaptedv to wrap said piece of sheet metal around said horn, andmeans adapted to hold said folded sheet metal against said horn duringthe initial riod of the reced ing movement of said wing folders.

5. An apparatus of the character described, comprising a horn aroundwhich a piece of sheet metal is adapted to be Wrapped with ends,overlapping. an inside former and an outside former adapted tosheetdmetal into U or channel form, and means for compressing said U-edoverlapped portions while held by said outside former, said insideformer being movable out of the 'U-ed portion to permit the inwardcollapse of the U-ed portions, and the consequent formation of' a lockedseam, wmg fold- 6. An apparatus of the character de-' scribed,comprising a horn around which a piece of sheet metal is adapted to bewrapped with ends overlapping, an inside former and an outside formeradapted to bend the overlapped portions of the piece of sheet metal intoU or'channel form, and means for compressing said U-ed overlappedportions while held by said outside former, said inside former beingmovable out of the U-ed portion to permit the inward collapse of theU-ed portions, and the consequent formation of aloclred seam, wingfolders adapted to and means 7 wrap said piece of sheet metal aroundsaid horn, said U-ed portion compressing means and means adapted to movesaid hammer sheet in lapped position prior to the bending action thereonof said formers.

An apparatus of the character described, comprising a horn around whicha piece of sheet metal is adapted to be wrapped with ends overlapping,an inside former and an outside former adapted to bend the overlappingportions of the piece of sheet metal into U or channel form, and meansfor com- 'compr ising a resiliently mounted hammer,

ltltl pressing said U-ed overlapped portions while held by said outsideformer, and means comprising a cam slide engaging said inside former formoving-said inside former in and out of said outsider former.

8. An apparatus of the character described, comprising .a horn aroundwhich a piece of sheet metal is adapted to be wrapped With endsoverlapping, an inside former and an outside former adapted to bend theoverlapping portions of the piece of sheet metal into U or channelform,means for compressing said U-ed overlapped portions while held by saidoutside former, and means comprising a cam slide engaging said insideside former being movable out of the U-ed portion to permit the inwardcollapse of the U-ed portions, and the consequent formation of a lockedseam, and means for bending one edge of the sheet prior to reaching saidhorn, whereby said edges may readily overlap when said sheet is wrappedaround the horn.

10. An apparatus of the character described, comprising a horn, wingfolders adapted to wrap a piece of sheet metal around said horn, andmeans on said wing folders adapted to hold said folded sheet metalagainst said horn during the initial period of the receding movement ofsaid wing folders.

11. An apparatus of the character described, comprising a horn, wingfolders adapted to wrap a piece of sheet metal around said horn, andmeans on said wing folders adapted to hold said folded sheet metalagainst said horn during the'initi-al period of the receding movement ofsaid wing folders, said means comprising resiliently mounted presserpieces.

In witness whereof, I have hereunto signed my name.

PETER KRUSE.

